Other Fuel System Pump problems of the 2001 BMW 3 Series

1) car would not start, fuse blown on fuel pump. (no. 1 original) towed to mechanic. 2) mechanic replaces fuel pump. (no. 2) 3) return car to driveway where it sits over night. Car won't start. Towed it to mechanic. Replaced fuel pump, and he allows it to sit in his garage over night. (no. 3) 4) car won't start. He thoroughly checks the car for problems, replaces the fuel pump, emptying fuel tank, replacing with new gasoline. (no. 4) mechanic cut opened the original fuel pump and found that the impeller had swollen. This suggested to him that the high ethanol content fuel was swelling the impeller. He tried using both BMW parts and after market parts. This isn't not an issue with the age of the car. He saved the fuel pump and a gasoline sample.